The depth a Campbell's needs to burrow properly
A Campbell's dwarf hamster spends a large share of her waking life underground, so bedding depth is the single most important measurement in her enclosure. Six inches across the whole floor is the working minimum for this species — enough for her to dig down, turn around below the surface, and build a sleeping chamber. Where the enclosure allows it, bank one end up to 8 or 10 inches: a Campbell's given a deep end will route most of her tunnelling there and keep expanding the system night after night.
Bedding that holds a tunnel
Depth only works if the material cooperates, and a Campbell's needs bedding that holds a tunnel roof instead of caving in behind her. Paper-based bedding is the reliable choice for this species because its fibres lock together when compressed; mixing in a little clean hay adds structure the way roots hold soil. Very light, fluffy materials make poor burrowing ground on their own because they collapse, and dusty substrates are a bad trade for a dwarf hamster whose face spends hours pressed into the bedding as she digs.
Laying it so the burrow system lasts
How you add the bedding matters almost as much as how much. Fill the enclosure in layers of about 2 inches, pressing each layer down firmly with the flat of your hand before adding the next, so the finished bed is dense enough to hold a burrow's shape. Set heavy items — the wheel, sand bath, and ceramic hideouts — on the enclosure floor or on buried platforms before filling, never resting on top of deep bedding where a tunnel dug underneath can topple them onto the hamster. Leave one shallower corner for the water bottle's drip zone so the main bed stays dry.
Watching how your Campbell's uses the depth
A Campbell's tells you whether the depth is right by where she sleeps. If she vanishes below the surface and you hear faint digging after lights-out, the bed is working. If she sleeps in a surface hideout night after night, or piles bedding into one corner herself to manufacture depth, the floor layer is too thin or too loose. Entrances that keep reappearing in new places are a good sign — an active dwarf hamster remodels constantly when the material lets her.
Topping up without collapsing the tunnels
Deep bedding for a Campbell's is maintained, not replaced wholesale. Spot-clean the surface and her toilet corner every few days, and every few weeks lift out only the soiled sections, leaving intact tunnel stretches standing where you can. When you add fresh bedding, press it into the gaps rather than fluffing it over the top, and expect her to spend the next evening happily re-engineering whatever you disturbed. A full strip-out should be rare; this species maps her home underground and a total reset erases the map.
Because several people often share hamster duty in a household, the target depth is worth writing down once, and KinsLe's Family Sharing keeps that bedding depth and layout on your Campbell's profile so a partner or older child topping up the enclosure matches the 6-to-10-inch setup instead of guessing.